Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: BFGVILASG00

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
630-996 4 Downers Grove IL 6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2026-01-11   
630-996 5 Downers Grove IL 6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2026-01-11   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.